int sob(int* arr, int arrSize) {
    int sum = 0;
    for (int start = 0; start < arrSize; start++) {
        for (int length = 1; start + length <= arrSize; length += 2) {
            int end = start + length - 1;
            for (int i = start; i <= end; i++) {
                sum += arr[i];
            }
        }
    }
    return sum;
}